<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<form action="/chuangkou1" method="post">
  <input name="username1">
  <input type="submit">
</form>
<br>
<br>
<br>

<form action="/chuangkou2" method="post">
  <input name="username2">
  <input type="submit">
</form>
<br>
<br>
<br>

<form action="/chuangkou3" method="post">
  <input name="username3">
  <input type="submit">
</form>
<br>
<br>
<br>

<form action="/chuangkou4" method="post">
  <input name="username4">
  <input type="submit">
</form>
<br>
<br>
<br>


</body>
</html>